Quick Summary
HTW-FC09-FVMN-24 is a Modulating Thermostat designed for fan coil units in commercial buildings. It controls fan operation and a 0–10V valve signal. The controller supports both three-speed fan and EC fan systems. Heating or cooling output adjusts based on room temperature and set point.
This page explains the control logic and engineering value of this Modulating Thermostat. It also confirms key parameters, wiring concepts, and model configuration. Typical project questions and deployment notes are included. Customisation options for special HVAC projects can also be discussed.
Modulating Thermostat Functional Highlights
(This section introduces the main control functions and their engineering value in the specific HVAC system.)
(01) 3-speed fan and EC fan compatibility
This Modulating Thermostat supports both traditional three-speed fans and EC fan motors. This flexibility simplifies controller selection and reduces spare model requirements across mixed fan coil installations.
(02) 2-pipe 0–10V modulating valve control
The thermostat provides a stable 0–10V signal to regulate valve opening gradually. Smooth valve modulation helps maintain stable room temperature and reduces frequent valve switching.
(03) Built-in transformer with 24V valve output
A built-in transformer supplies 24V power for the valve actuator directly. This design simplifies installation wiring and reduces the need for external power modules.
(04) RS485 Modbus communication
RS485 Modbus allows integration with building management systems when needed. Central monitoring helps facility teams supervise room temperature and system status more efficiently.
If one is also looking for a Wi-Fi app control feature, one may refer to this model instead (click → HTW-FC09-FVMN-24ZB).
(05) Programmable temperature scheduling
Programmable timing allows different temperature settings during day and night periods. Scheduled control reduces unnecessary system operation and supports more stable energy management.
Modulating Thermostat Display
(This section shows the thermostat appearance, screen interface, or installation dimensions of this specific model.)
Modulating Thermostat Specifications
(This section lists the key technical parameters relevant to this thermostat model.)
| Parameter | Value |
|---|---|
| Power Supply | 95–240Vac, 50/60Hz |
| Fan Relay Load | 5A |
| Built-in Sensor | NTC3950, 10K |
| Temperature Accuracy | ±0.5°C |
| Set-Point Range | 5–35°C |
| Installation | Standard 86×86 mm box |
| Warranty | 2 Year |
Modulating Thermostat Wiring Diagram
(This section provides the wiring diagram for this thermostat in the relevant HVAC control system.)
Project Fit & Customization
(This section describes project suitability, system limitations, and available customization options.)
This Modulating Thermostat is not suitable for four-pipe systems requiring separate heating and cooling valves. It is also not intended for installations needing direct Wi-Fi control or mobile applications. Projects requiring BACnet communication or complex BMS control logic may need other controller models.
Despite these limitations mentioned above, functional adjustments may still be discussed. Communication options, additional sensors, or control logic can be modified through ODM collaboration. Engineering confirmation is normally required before software or hardware adjustments.
OEM cooperation is also supported for project branding requirements. This may include logo printing, label changes, and customised packaging. Colour adjustments or panel markings may also be discussed for large quantity projects.
Certifications
(This thermostat complies with European market requirements and is supported by certifications such as CE, RoHS, LVD test reports, EMC test reports, etc)
Exhibition Moments
(Our team regularly participates in international HVAC exhibitions such as Febrava in Brazil, The Big 5 in Dubai, and ISK-SODEX in Turkey, etc.)
Frequently Asked Questions
Q1. Can this Modulating Thermostat control EC fan fan coil units?
Yes. The controller supports both EC fan motors and traditional three-speed fans. This allows the same thermostat to be used in different fan coil installations.
Q2. Can the thermostat control a modulating valve?
Yes. It provides a 0–10V signal to regulate valve opening gradually. This allows stable room temperature control without frequent valve switching.
Q3. Can this thermostat connect to a building management system?
Yes. RS485 Modbus communication allows integration with many building management systems. Facility teams can monitor temperature data and adjust settings if required.
Q4. Does the thermostat include power for the valve actuator?
Yes. A built-in transformer provides 24V output for valve actuators. This helps reduce additional power modules in the control cabinet.
Q5. What is the minimum order quantity and can I get samples?
Samples are available for testing and evaluation. The typical MOQ is about 300 units. Smaller trial orders around 100 units can sometimes be discussed.
Q6. How do I place an order and arrange payment?
Contact us to confirm project requirements first. We will provide a proforma invoice. Payment methods include TT, PayPal, or Visa, with EXW, FOB, or DAP terms.
Q7. How long does production normally take?
Standard samples usually ship within seven days. Customised products require engineering review and software adjustment, typically three to five weeks.
Q8. How will the goods be shipped?
Courier delivery such as DHL, FedEx, or UPS usually takes about seven days. Air freight takes about a week, while sea shipping normally requires around one month.
Need Support?
If you need help selecting the correct Modulating Thermostat model, please contact our team. We can assist with wiring questions and project configuration. To find out others, please click (Modbus thermostats).
Final Note
Many HVAC projects require stable temperature control and simple fan coil management. This Modulating Thermostat manages fan operation and valve modulation within the room control loop. The controller helps maintain steady operation and supports efficient facility monitoring.
